Development of Raphanus sativus L. under different water depths and organic fertilizer sources

Trevisan, Matheus Hofmann; Silva, Sandra Andréa Santos da; Silva, Rafael Oliveira da

doi:10.26545/ajpr.2020.b00079x

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“…Although the treatments did not have statistically deferred from each other in terms of leaves number, higher N doses provided yellowing followed by burning in some leaves and reduced size. This demonstrates that even though the plant of the same species does not alter its leaves release, the disturbance in the supply of some essential element causes alterations in the crop normal development, resulting in yellowing symptoms and leaf area reduction (Trevisan et al, 2020). It can be seen that the highest N dose used (12g), corresponding to treatment T4, provided values of 44,94 g of APFM, 13,46 g of RFM and 4,14 g of RDM, both statistically lower than those achieved in the other treatments.…”

Section: Leaves Numbermentioning

confidence: 98%

Application of different nitrogen doses in fertirrigated cacao seedlings

Trevisan

Silva

Araújo

et al. 2021

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The Medicilândia municipality is the main dried cocoa beans producer in Pará state, however, researches are being carried out in relation to the seedlings production. The study objective was to study the cacao seminal seedlings growth under a drip irrigation system, receiving different nitrogen doses with fixed doses of phosphorus (4,5 g) and potassium (3 g) through fertirrigation. The experiment was realized under greenhouse conditions with four treatments and five repetitions in a design of randomized blocks, being each composed by seven plants. Thus, T1 = check, without fertilization; T2 = 2 g of N + P and K; T3 = 7 g of N + P and K; T4 = 12 g of N + P and K. The treatments were scientific from the 31st to the 156th day after sowing, where the values of height, collar diameter and leaves number were obtained fortnightly. On the 156th day, the plants were harvested and obtained the root length, fresh matter and aerial part dry matter and root and the nutritional contents from the leaf and root plant tissue. The plants obtain results with the highest values of height, collar diameter and leaves number in the T2 treatment.

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Section: Leaves Numbermentioning

confidence: 98%